Unattended Setup

hello
i’ve prepared ua setup for w2k. the problem is that i’ve to prepare two w2k partitions at one machine.
Part1 primary W2KProd
Part2 extended W2KEmergency
I’ve one bootdisk with gdisk to prepare the partitions,setting one part as active and starting uasetup. After the first part w2k reboots and i’ve to reject the disk. After second part and rebboting I’ve to put in the disk to start 2nd installation. How can I perform this without user action for the disk.
Or is my solution wrong and there is an?ther possibility.
Can I say the uasetup to install w2k in a special part. like multi(0)disk(0)rdisk(0)partition(3)as in boot.ini